Company lists · Data refreshed September 2026

Top 25 Enterprise HR system companies based in the United States

Name: Enterprise HR system companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 683 companies tracked

RevenueBase identified 683 enterprise HR system companies headquartered in the United States as of September 2026 and tracks 158,678 professional contacts across them, including 57,338 with verified work emails. New York is the largest hub.

This list covers enterprise HR system companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

683Companies

158,678Contacts tracked

57,338Verified emails

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The 25 largest enterprise HR system companies based in the United States

Ranked by team size

Top 25 of 683 enterprise HR system companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise HR system companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	ADP	Indirect evidence	Roseland, NJ, United StatesHQ checked Sep 28, 2026	10001+	84,166 contacts →
	Indirect evidence “Designing better ways to work through cutting-edge products, premium services and exceptional experiences that enable people to reach their full potential.” Source: RevenueBase Database · checked Sep 28, 2026
2	Paychex	Partial evidence	Rochester, NY, United StatesHQ checked Sep 28, 2026	10001+	17,911 contacts →
	Partial evidence “As the future of work continues to evolve, Paychex leads the way by making complex HR, payroll, and benefits brilliantly simple.” Source: RevenueBase Database · checked Sep 28, 2026
3	Paycom	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 28, 2026	5,001-10,000	7,002 contacts →
	Partial evidence “Paycom (NYSE:PAYC) automates the entire employee life cycle in a truly single HR and payroll software.” Source: RevenueBase Database · checked Sep 28, 2026
4	Paylocity	Partial evidence	Schaumburg, IL, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,153 contacts →
	Partial evidence “Paylocity (NASDAQ: PCTY) is an award-winning provider of cloud-based HR, payroll and spend management software solutions.” Source: RevenueBase Database · checked Sep 28, 2026
5	Dayforce	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,902 contacts →
	Indirect evidence “Dayforce is as a global leader in HCM technology focused on improving work for thousands of customers and millions of employees around the world.” Source: RevenueBase Database · checked Sep 28, 2026
6	Strada	Indirect evidence	The Woodlands, TX, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,585 contacts →
	Indirect evidence “With over 30 years as a global people, payroll, and technology leader, Strada specializes in removing complexity to simplify workforce management.” Source: RevenueBase Database · checked Sep 28, 2026
7	Paycor	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,615 contacts →
	Partial evidence “Paycor’s HR, payroll, and talent platform connects leaders to people, data, and expertise.” Source: RevenueBase Database · checked Sep 28, 2026
8	Kronos Incorporated	Indirect evidence	Lowell, MA, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,889 contacts →
	Indirect evidence “Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.” Source: RevenueBase Database · checked Sep 28, 2026
9	Bamboohr	Indirect evidence	Draper, UT, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,812 contacts →
	Indirect evidence “For 16 years, BambooHR has embarked on a mission to help organizations and their employees build better workplaces and achieve their unique missions.” Source: RevenueBase Database · checked Sep 28, 2026
10	Avature	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,535 contacts →
	Partial evidence “Pioneer of CRM technology for recruiting, Avature is a highly configurable enterprise SaaS platform for talent acquisition and talent management that drives innovation in the HCM…” Source: RevenueBase Database · checked Sep 28, 2026
11	SSS	Partial evidence	Littleton, CO, United StatesHQ checked Sep 28, 2026	n/a	1,376 contacts →
	Partial evidence “Employee Based Systems (EBS) is a innovative HRMS software development, implementation training, support, and services company specializing in helping companies improve…” Source: RevenueBase Database · checked Sep 28, 2026
12	Keka HR	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	501-1,000	1,182 contacts →
	Partial evidence “Keka is a leading unified HR and payroll platform that helps organizations run people operations with consistency, compliance, and operational clarity.” Source: RevenueBase Database · checked Sep 28, 2026
13	Ultimate Software	Indirect evidence	Weston, FL, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,084 contacts →
	Indirect evidence “Built from the merger of Ultimate Software & Kronos Inc, we are now UKG.” Source: RevenueBase Database · checked Sep 28, 2026
14	Topbloc	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	756 contacts →
	Indirect evidence “Everforth TopBloc leverages proprietary automation to deploy Workday’s Human Capital Management, Payroll, and Financials business services quickly and efficiently, reducing…” Source: RevenueBase Database · checked Sep 28, 2026
15	Coadvantage	Indirect evidence	Bradenton, FL, United StatesHQ checked Sep 28, 2026	201-500	586 contacts →
	Indirect evidence “CoAdvantage is now CoAd.” Source: RevenueBase Database · checked Sep 28, 2026
16	Electronic Commerce, Inc. Eci, INC	Indirect evidence	Elkhart, IN, United StatesHQ checked Sep 28, 2026	201-500	583 contacts →
	Indirect evidence “As a leading HCM technology and services provider, Vibe HCM Inc.” Source: RevenueBase Database · checked Sep 28, 2026
17	Prismhr	Partial evidence	Chandler, AZ, United StatesHQ checked Sep 28, 2026	201-500	436 contacts →
	Partial evidence “PrismHR creates exceptional software and services, empowering human resource outsourcing service providers such as Professional Employer Organizations (PEOs) and HR outsourcers to…” Source: RevenueBase Database · checked Sep 28, 2026
18	Arch Latam	Indirect evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	201-500	334 contacts →
	Indirect evidence “Somos parte de ARCH Resources Group, un conglomerado líder en el desarrollo de soluciones en Recursos Humanos, con presencia en 12 países del continente.” Source: RevenueBase Database · checked Sep 28, 2026
19	Proliant	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	201-500	320 contacts →
	Partial evidence “ProLiant provides a fully integrated, cloud-based human capital management solution that simplifies payroll and HR processes, improves accuracy, and ensures industry compliance.” Source: RevenueBase Database · checked Sep 28, 2026
20	Myers-Holum	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	292 contacts →
	Indirect evidence “Award-winning NetSuite and Stripe partner.” Source: RevenueBase Database · checked Sep 28, 2026
21	Experian Employer Services	Indirect evidence	Costa Mesa, CA, United StatesHQ checked Sep 28, 2026	501-1,000	291 contacts →
	Indirect evidence “Employers need a partner they can rely on to face today’s new challenges.” Source: RevenueBase Database · checked Sep 28, 2026
22	Amvotech Solutions INC	Indirect evidence	Oakbrook Terrace, IL, United StatesHQ checked Sep 28, 2026	501-1,000	281 contacts →
	Indirect evidence “In this competitive world, what your company needs is a winning horse.” Source: RevenueBase Database · checked Sep 28, 2026
23	INOVA	Partial evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	201-500	271 contacts →
	Partial evidence “Inova Payroll is a leading employer services company, integrating payroll and human capital management (HCM) technology with personalized support and full-service HR outsourcing.” Source: RevenueBase Database · checked Sep 28, 2026
24	Trinet Zenefits	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	258 contacts →
	Indirect evidence “Zenefits is a part of TriNet.” Source: RevenueBase Database · checked Sep 28, 2026
25	Terillium	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 28, 2026	201-500	210 contacts →
	Indirect evidence “There’s a reason over businesses have selected Terillium for ERP software implementations, upgrades, managed services, and strategic assessments.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: enterprise HR system companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names enterprise HR system companies.
Partial evidence: Its own public description names part of enterprise HR system companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise HR system companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 683 enterprise HR system companies based in the United States

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Enterprise HR system companies based in the United States at a glance

As of Sep 28, 2026

36.1%Verified-email coverage

232.3Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

221

11-50

265

51-200

130

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 683 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among enterprise HR system companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “enterprise HR system companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names enterprise HR system companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among enterprise HR system companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 57,338 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names enterprise HR system companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many enterprise HR system companies are there based in the United States?

RevenueBase identified 683 enterprise HR system companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

ADP, headquartered in Roseland, tops this list with the largest team on record.

Which city has the most enterprise HR system companies?

New York leads with 14 headquartered companies, followed by Atlanta (12) and San Francisco (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 57,338 verified decision-maker contacts tracked across these 683 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.